Document Detail


Redefining the roles of sensors in objective physical activity monitoring.
MedLine Citation:
PMID:  22157770     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Because physical activity researchers are increasingly using objective portable devices, this review describes the current state of the technology to assess physical activity, with a focus on specific sensors and sensor properties currently used in monitors and their strengths and weaknesses. Additional sensors and sensor properties desirable for activity measurement and best practices for users and developers also are discussed.
BEST PRACTICES: We grouped current sensors into three broad categories for objectively measuring physical activity: associated body movement, physiology, and context. Desirable sensor properties for measuring physical activity and the importance of these properties in relationship to specific applications are addressed, and the specific roles of transducers and data acquisition systems within the monitoring devices are defined. Technical advancements in sensors, microcomputer processors, memory storage, batteries, wireless communication, and digital filters have made monitors more usable for subjects (smaller, more stable, and longer running time) and for researchers (less costly, higher time resolution and memory storage, shorter download time, and user-defined data features).
FUTURE DIRECTIONS: Users and developers of physical activity monitors should learn about the basic properties of their sensors, such as range, accuracy, and precision, while considering the data acquisition/filtering steps that may be critical to data quality and may influence the desirable measurement outcome(s).
Authors:
Kong Y Chen; Kathleen F Janz; Weimo Zhu; Robert J Brychta
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Intramural; Review    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  44     ISSN:  1530-0315     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2012 Jan 
Date Detail:
Created Date:  2011-12-14     Completed Date:  2012-10-22     Revised Date:  2013-07-15    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  S13-23     Citation Subset:  IM; S    
Affiliation:
Diabetes, Endocrinology, and Obesity Branch, Intramural Research Program, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA. chenkong@mail.nih.gov
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MeSH Terms
Descriptor/Qualifier:
Exercise / physiology
Humans
Monitoring, Physiologic / instrumentation*,  methods
Motor Activity / physiology*
Transducers
Grant Support
ID/Acronym/Agency:
R01 DE012101-13/DE/NIDCR NIH HHS
Comments/Corrections

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